As you have pointed out, the first equation is a circle. The second happens to be a hyperbola.
To make life easier
This should make life easier for finding the charateristics you describe above.
how can i write this into this equation of hyperbola?
I graphed this y=48/x
it turns like this:
http://www.flickr.com/photos/49966448@N07/4587282411/
but i dont know how to get the foci, axes, vertices, etc.
please help thanks!